1、 Overview

DC-LWQseriesGas intelligent turbine flowmeterMy company follows theGB/T18940-2003A new generation of high-precision and highly reliable precision measuring instruments that integrates temperature, pressure, flow sensors, and intelligent flow integrators, developed in accordance with advanced technologies for flow meters at home and abroad. Its excellent low-pressure and high-pressure measuring performance, multiple signal output methods, and low sensitivity to fluid disturbances make it an ideal choiceDC-LWQThe series flowmeter has become a special commercial trade measuring instrument that can accurately measure the cumulative amount of gas. Guangzhou Dichuan Instrument Co., Ltd

This flowmeter is widely used in the measurement of urban pipeline (network) gas, industrial gas, gas pressure regulating stations, energy management, and the measurement or flow control of various non corrosive gases.Guangdong liquefied gas turbine flowmeter

This product has been inspected by the national explosion-proof product quality inspection departmentGB3836-2000Electrical Equipment for Explosive Gas Environments1part:
General Requirements ",GB3836.2-2000Electrical Equipment for Explosive Gas Environments2part:Explosion proof type“d”》AndGB3836.4-2000Electrical Equipment for Explosive Gas Environments4Part: Intrinsically Safe Type“i”》The standard inspection is qualified, and the explosion-proof mark isExdIIBT4(Explosion proof type), ExdIIBT4, ExiaIICT4,(Intrinsic safety type). Suitable for containingIIA,IIB,IICclassT1~T2Temperature group for explosive gas mixtures0(Only intrinsic safety type)1.2Dangerous areas in the district.
2、 Main features
satisfyGB/T18940-2003The standard technical requirement is that the length of the table body is3DN（DNFor the diameter of the flow meter, and through high
Low level disturbance test;
It can detect the temperature, pressure, and flow rate of the gas being tested, perform automatic flow tracking compensation and compression factor correction, and display under standard conditions（Pb=101.325KPa,Tb=293.15K）Accumulated gas volume;
Wide flow range（Qmin/Qmax=20:1)Good repeatability and high accuracy (up to)1.0Low pressure loss and initial flow rate;
It has the function of setting eight instrument coefficients and automatic correction;
Adopting an integrated rectifier, the installation requirements for the front and rear straight pipe sections of the flowmeter are low (the front is...)≥2DNNo downstream requirements);
Built in pressure and temperature sensors, high safety performance, compact structure, and beautiful appearance;
Capable of self diagnosing faults in pressure and temperature sensors and displaying them directly on the screenLCDOn screen;
A lithium battery can be used continuously for more than five years and has a two-level alarm output function for battery undervoltage, which is more suitable for use withICSupporting use of card management system;
The intelligent flow integrator can be positioned at any angle (with a rotation angle of)350°）Make the reading of the flowmeter more convenient and direct under various installation conditions;
The unique functions of time display and real-time data storage ensure that internal data will not be lost or saved under any circumstances;
The instrument hasRS-485Communication interface function,And equipped with powerful functions,A data management software system with rich interfaces,Can print various automatically generated charts;
The instrument has explosion-proof and protective functions, and the explosion-proof mark isExdⅡBT6Gb,protection gradeIP65
According to user requirements,Can provide pressure,Function of setting temperature constant value,Especially suitable for dielectric forces,In situations where the temperature is relatively stableGuangdong liquefied gas turbine flowmeter
3、 Technical performance indicators

3.1 Standards and Certification
Execution standardsGB/T18940-2003national standard;
conform toPrEN 12261European Community standards;
executeJJG1037-2008Calibration Regulations for Turbine Flowmeters.
3.2 accuracy class
The maximum allowable errors for all flow meters within their entire flow range are±1.0%perhaps±1.5%The accuracy is1.0Grade or1.5Level), when the small traffic is less than0.2QmaxAt that time, inQmin～0.2QmaxThe maximum allowable errors within the range are±2.0%perhaps±3.0%.
3.3 Conditions of Use
Environmental temperature: -30℃～+60℃；
Medium temperature: -30℃～+80℃；
Atmospheric pressure:86KPa～106KPa；
Relative humidity:5%～95%
3.4 Mechanical performance indicators
3.4.1Model specifications and basic parameters of flow meters (Table)1）

(Table)1）

Note:① The flow range listed in the table is the flow range during product factory calibration (at room temperature and atmospheric pressure)ρ=1.205kg/m3）；

② As the pressure increases, the flow range also expands;

③C、K、DRepresenting small, medium, and large flow ranges for the same caliber respectively;

④ Unless otherwise specified,All products are according to1.5Grade factory ；

⑤ Other traffic ranges,Please specify when placing an order ；

3.4.2Typical characteristic curve of flowmeter
The typical characteristic curve of the flowmeter is shown in the figure1As shown, the vertical axis represents the fundamental error, and the horizontal axis represents the percentage of flow rate

In order to provide you with better service, please carefully choose products that are suitable for your specific needs based on your actual situation. After understanding the basic attributes of our product, you can select the appropriate instruments based on design requirements and on-site conditions, and order according to the complete product specification code.

When suitable instruments cannot be selected according to design and usage requirements, please raise questions and requirements. Our professionals will assist you in selecting or designing special products for you. Please provide at least the following information: working pressure, working temperature, medium name, material requirements, etc. Technical Consultation Guangzhou Dichuan Instrument Co., Ltd